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Oct 10, 2026OpenAI

Codex starts suggesting the user's next message: OpenAI launches “composer predictions” in beta

On October 9, 2026, OpenAI turned on “composer predictions” in the Codex desktop app, a beta feature for adult ChatGPT Pro users that proposes the next message after each response, is accepted with the Tab key and is never sent automatically.

Oct 10, 2026StepFun

StepFun brings Step 5 Preview, its 600-billion-parameter model, to OpenRouter ahead of releasing its weights

Chinese company StepFun made its flagship Step 5 Preview model available on OpenRouter and Vercel AI Gateway on October 8, 2026, at $1 per million input tokens, and promises to publish its open weights on October 15.

Oct 7, 2026GitHub

GitHub makes stacked pull requests generally available, designed with AI agent code in mind

GitHub made stacked pull requests available on all github.com plans, letting teams split large changes into chains of small, dependent reviews; the company says repositories that used them in preview merged 9% more code, and it pitches the format for AI agent work.

Oct 6, 2026Reflection AI

Reflection unveils Beam, a 501-billion-parameter open-weight model

U.S. startup Reflection AI unveiled Beam, its first frontier open-weight model: a mixture-of-experts system with 501 billion total parameters and 23 billion active, aimed at coding, reasoning and agents, whose weights it promises to release this month under an Apache 2.0 license.